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Bad manifold


 
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Rob Mo.
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Joined: 16 Feb 2001
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PostPosted: Sat Jan 12, 2013 3:13 pm    Post subject: Bad manifold Reply to specific post Reply with quote

Been working on a 900 Ford the past couple of days. It's coming together well, but with its lessons learned along the way. Bought a new manifold for it & installed it. The tractor wouldn't even start with it on. Odd, Right? I fixed te original manifold & put it on. The tractor fired right up. After comparing the new with the used, the casing inside the new manifold was a very course casting on the inside, I guess causing it not to flow smoothly. Amazing the there are junk new parts out there.
 
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souNdguy
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PostPosted: Sat Jan 12, 2013 4:27 pm    Post subject: Re: Bad manifold Reply to specific post Reply with quote

i doubt a simple roughness would cause issue.. but investivate deeper. I have heard of ports 100% blocked..
 
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old
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Location: Lake of the Ozarks area of MO

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PostPosted: Sat Jan 12, 2013 6:25 pm    Post subject: Re: Bad manifold Reply to specific post Reply with quote

I would have to agree with sound ruff should not stop it from running. I would do a rotto rooter test and make sure you can run a wire or other such thing from the carb bolt on flange to each and every one of the intake ends. I would also try a air test so as to make sure you do not have an exhaust and intake cross over
 
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Rob Mo.
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PostPosted: Sat Jan 12, 2013 8:44 pm    Post subject: Re: Bad manifold Reply to specific post Reply with quote

Wouldn't the engine be labored to create power? Or does it not create enough vacuum to affect its performance?
 
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JMOR
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PostPosted: Sat Jan 12, 2013 9:03 pm    Post subject: Re: Bad manifold Reply to specific post Reply with quote

" the casing inside the new manifold was a very course casting on the inside, I guess causing it not to flow smoothly."

I guarantee you that you have not found the source of it not running with 'rough' manifold!!!!
 
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Sean in PA
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Joined: 27 Feb 2008
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Location: Southeast PA

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PostPosted: Sun Jan 13, 2013 4:15 am    Post subject: Re: Bad manifold Reply to specific post Reply with quote

JMOR wrote:
(quoted from post at 01:03:51 01/13/13) " the casing inside the new manifold was a very course casting on the inside, I guess causing it not to flow smoothly."

I guarantee you that you have not found the source of it not running with 'rough' manifold!!!!


I agree. Jut check out all of the wonderful "turbulence/vortex" inducing snake oil people are selling on fleabay. If turbulence in the intake would keep an engine from running, then those sellers would have 100% negative feedback.
 
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